Best Underground River
Updated Daily
The Jeita Grotto is a remarkable karst cave system located in Lebanon. It features two distinct levels showcasing impressive limestone formations including one of the world’s longest stalactites within its upper gallery. The grotto also contains an underground river vital to the local ecosystem. It'...
Kong Lor Cave in Khammouane Province, Laos, carries the Nam Hinboun River through a 7.5 km passage inside a limestone mountain, navigable by boat within Phu Hin Bun National Park.
The Gouffre de Padirac is a large karst chasm in the Lot region of France, explored since 1889, featuring an underground river navigable by boat.
Tham Nam Lod is a river cave in Mae Hong Son, Thailand, notable for its massive stalactites and ancient teakwood coffins dated to over 1,000 years ago.
The Grotte de Han-sur-Lesse in Belgium is an immense karst cave system carved by the Lesse River, featuring spectacular geological formations.
Benxi Water Cave is a flooded limestone cave in Liaoning, China, notable for housing a massive underground river that stretches over five kilometers and accommodates underground boat cruises.
Cave system in the Moravian Karst, Czech Republic, through which the Punkva River flows underground; partly toured by boat and providing access to the Macocha Abyss.
Planinska Jama is a major limestone cave in Slovenia, notable for its massive entrance and an underground hall where two distinct subterranean rivers, the Pivka and the Rak, converge.
The Grotte de Remouchamps in Belgium features the longest underground river navigable by boat in the country, offering tours since the 19th century.
Goa Pindul is a river cave in Yogyakarta, Indonesia, notable for popularizing cave tubing, where visitors float through the karst tunnel on inner tubes.
Show cave in the Ligurian Alps of Piedmont, Italy, notable for hosting one of the world's first permanent underground scientific research stations, established in 1969.
Underground river cave near L'Aquila, Abruzzo, Italy, through which the Stiffe stream flows, creating cascades and emerald pools visible to visitors on a guided walkway.
